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Business Segments and Geographic Information - Income Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Pre-Tax Income Reconciliation of Segments |  |  |  |
Operating income from segments | $ 78,159 | $ 69,780 | $ 234,111 | $ 201,181
Unallocated Amount: |  |  |  |
General and Administrative Expenses | (48,488) | (47,647) | (142,183) | (136,927)
Gain (loss) on extinguishment of debt | 594 | 0 | (5,147) | (574)
Income before income taxes and equity in earnings of affiliates | 48,794 | 40,217 | 136,234 | 116,596
Operating Segments |  |  |  |
Pre-Tax Income Reconciliation of Segments |  |  |  |
Operating income from segments | 126,647 | 117,427 | 376,294 | 338,108
Segment Reconciling Items |  |  |  |
Unallocated Amount: |  |  |  |
General and Administrative Expenses | (48,488) | (47,647) | (142,183) | (136,927)
Net Interest Expense | (29,959) | (29,563) | (92,730) | (84,011)
Gain (loss) on extinguishment of debt | $ 594 | $ 0 | $ (5,147) | $ (574)

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